The Address Resolution Protocol named ARP it is a component of IP networking on any operating system.
Without this system, a machine could not communicate to the outside world.
The ARP Cache is a collection of ARP entries / mostly dynamic that are created when a hostname is resolved to an IP address and then an IP address is resolved to a MAC address .
The PC will store that newly mapped address in the ARP cache and then will stay there until the ARP cache entry timeout expires.
So open a command prompt run as admin this command:
Displays and modifies the IP-to-Physical address translation tables used by
address resolution protocol (ARP).
ARP -s inet_addr eth_addr [if_addr]
ARP -d inet_addr [if_addr]
ARP -a [inet_addr] [-N if_addr] [-v]
-a Displays current ARP entries by interrogating the current
protocol data. If inet_addr is specified, the IP and Physical
addresses for only the specified computer are displayed. If
more than one network interface uses ARP, entries for each ARP
table are displayed.
-g Same as -a.
-v Displays current ARP entries in verbose mode. All invalid
entries and entries on the loop-back interface will be shown.
inet_addr Specifies an internet address.
-N if_addr Displays the ARP entries for the network interface specified
-d Deletes the host specified by inet_addr. inet_addr may be
wildcarded with * to delete all hosts.
-s Adds the host and associates the Internet address inet_addr
with the Physical address eth_addr. The Physical address is
given as 6 hexadecimal bytes separated by hyphens. The entry
eth_addr Specifies a physical address.
if_addr If present, this specifies the Internet address of the
interface whose address translation table should be modified.
If not present, the first applicable interface will be used.
> arp -s 126.96.36.199 00-aa-00-62-c6-09 .... Adds a static entry.
> arp -a .... Displays the arp table.
To delete a single entry you can use this:
arp -d xxx.xxx.xxx.xxx
… where the xxx.xxx.xxx.xxx it’s the ip address.
To delete or flush entire arp cache use this command:
netsh interface ip delete arpcache